21378735

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7541}}^1$

素因数の和:7565

約数の個数: 40

約数和(自身を含む): 43803936

約数和(自身を除く): 22425201

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7541, 22623, 37705, 52787, 67869, 113115, 158361, 203607, 263935, 339345, 475083, 610821, 791805, 1018035, 1425249, 2375415, 3054105, 4275747, 7126245, 21378735]

約数ペア:

[(1, 21378735), (3, 7126245), (5, 4275747), (7, 3054105), (9, 2375415), (15, 1425249), (21, 1018035), (27, 791805), (35, 610821), (45, 475083), (63, 339345), (81, 263935), (105, 203607), (135, 158361), (189, 113115), (315, 67869), (405, 52787), (567, 37705), (945, 22623), (2835, 7541)]